We do benefit too from commissions, a portion of the funding for the site comes from it so it does help us when people purchase an item after clicking our links, we lose a lot of that to sniping apps and aggregators as whoever the last click was gets attribution but we try to comb through the flotsam for the best stuff on a regular basis.
I’m actually thinking of doing some videos or short steams of me going through a few hundred items on eBay assessing them one by one, showing what I look for and what I skip etc, not sure if that would get much interest but it could be fun